0979583283
Lot 2, 2nd Floor, Building CT2, Ngo Thi Nham street, Ha Cau, Ha Dong, Ha Noi, Viet Nam
There are several proportions related to OPA black tea you might want to check out.
Stalks:
+ 30% Stalks: Color Black and brown
+ Length of stalks: 0.5cm -2cm
+ With of the stalks: 1mm - 3mm
Leaf:
+ Ratio: +30% Brown leaves + 70% Black leaves
+ Well twisted leaves 50%, Medium twisted leaves 20%, Open leaves 10%, Flaky leaves 7%, Broken leaves 3%
+ Color: Deep Black color 70%, Black color: 20%, Deep brown color 10%.